Accessing Data • index: Use [0] to get the first item. • at (): A modern way to get items. You can use negative numbers like -1 to get items from the end. This is safer than standard bracket notation ...

It allows you to use negative numbers to grab items from the end of the list. Changing and Combining Arrays • concat (): Joins two or more arrays into a new one. It does not change your original ...

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